Table 3.

Association between serum vitamin D levels and the presence of anxiety symptoms

Total vitamin D	Crude model		Model 1		Model 2
	OR (95% CI)	p-value	OR (95% CI)	p-value	OR (95% CI)	p-value
Categorical level
Sufficiency, ≥20 ng/mL	1 [Reference]		1 [Reference]		1 [Reference]
Insufficiency, 10–19.99 ng/mL	1.224 (1.124–1.333)	<0.001	1.116 (1.013–1.229)	0.026	1.116 (1.013–1.229)	0.027
Deficiency, <10 ng/mL	1.704 (1.539–1.886)	<0.001	1.277 (1.129–1.446)	<0.001	1.277 (1.128–1.445)	<0.001
Continuous level, ng/mL	0.974 (0.969–0.979)	<0.001	0.987 (0.981–0.993)	<0.001	0.987 (0.981–0.993)	<0.001

Model 1 was adjusted for age, sex, center (Seoul or Suwon), marital status, education, income, AUDIT, smoking status, season of data collection, BMI, CES-D. Model 2 was additionally adjusted for categorical CRP levels. CI: confidence interval, AUDIT: Alcohol Use Disorders Identification Test, BMI: body mass index, CES-D: Center for Epidemiologic Studies Depression Scale, CRP: c-reactive protein